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scsi: smartpqi: Quickly propagate path failures to SCSI midlayer

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Return DID_NO_CONNECT when a path failure is detected.

When a path fails during I/O and AIO path gets disabled for a multipath
device, the I/O was retried in the RAID path slowing down path fail
detection. Returning DID_NO_CONNECT allows multipath to switch paths more
quickly.

Link: https://lore.kernel.org/r/164375209313.440833.9992416628621839233.stgit@brunhilda.pdev.net
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Sagar Biradar <sagar.biradar@microchip.com>
Signed-off-by: Murthy Bhat <Murthy.Bhat@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Murthy Bhat 2022-02-01 15:48:13 -06:00 committed by Martin K. Petersen
parent 70ba20be4b
commit 94a68c8143
1 changed files with 18 additions and 2 deletions
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20
drivers/scsi/smartpqi/smartpqi_init.c
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@ -2291,6 +2291,14 @@ static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
return false;
}
static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
{
if (pqi_is_logical_device(device))
return false;
return (device->path_map & (device->path_map - 1)) != 0;
}
static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
{
return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
@ -3216,12 +3224,14 @@ static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
int residual_count;
int xfer_count;
bool device_offline;
struct pqi_scsi_dev *device;
scmd = io_request->scmd;
error_info = io_request->error_info;
host_byte = DID_OK;
sense_data_length = 0;
device_offline = false;
device = scmd->device->hostdata;
switch (error_info->service_response) {
case PQI_AIO_SERV_RESPONSE_COMPLETE:
@ -3246,8 +3256,14 @@ static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
break;
case PQI_AIO_STATUS_AIO_PATH_DISABLED:
pqi_aio_path_disabled(io_request);
scsi_status = SAM_STAT_GOOD;
io_request->status = -EAGAIN;
if (pqi_is_multipath_device(device)) {
pqi_device_remove_start(device);
host_byte = DID_NO_CONNECT;
scsi_status = SAM_STAT_CHECK_CONDITION;
} else {
scsi_status = SAM_STAT_GOOD;
io_request->status = -EAGAIN;
}
break;
case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
case PQI_AIO_STATUS_INVALID_DEVICE: